# 1995 Thunderbird p0402 code

**URL:** <https://community.cartalk.com/t/1995-thunderbird-p0402-code/59236>\
**Category:** Maintenance/Repairs\
**Tags:** thunderbird, ford\
**Created:** [December 28, 2010, 10:05pm UTC](https://community.cartalk.com/t/1995-thunderbird-p0402-code/59236 "2010-12-28T22:05:54Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![shaggy1677](https://avatars.discourse-cdn.com/v4/letter/s/5f9b8f/32.png) [@shaggy1677](https://community.cartalk.com/u/shaggy1677)\
**Post date:** [December 28, 2010, 10:05pm UTC](https://community.cartalk.com/t/1995-thunderbird-p0402-code/59236/1 "2010-12-28T22:05:54Z")

</div>

What could be setting this code? I am getting rotten mpg and the car idles at 800 rpm and revs to 1300 and drops again over and over at idle. Any ideas?

---

<div class="post-metadata">

**Author:** ![system](https://global.discourse-cdn.com/cartalk/original/3X/1/d/1d47c66a543aa6c5a7873bb2320858f978ff52ed.png) [@system](https://community.cartalk.com/u/system)\
**Post date:** [December 28, 2010, 10:56pm UTC](https://community.cartalk.com/t/1995-thunderbird-p0402-code/59236/2 "2010-12-28T22:56:08Z")

</div>

Sure you don’t mean P0420?

---

<div class="post-metadata">

**Author:** ![87\_Ranger](https://avatars.discourse-cdn.com/v4/letter/8/f14d63/32.png) [@87\_Ranger](https://community.cartalk.com/u/87_Ranger)\
**Post date:** [December 29, 2010, 12:09am UTC](https://community.cartalk.com/t/1995-thunderbird-p0402-code/59236/3 "2010-12-29T00:09:55Z")

</div>

Have your mechanic check the EGR. I show PO402 as “excessive EGR flow”, which is a good match for the lousy idle.